@charset "utf-8";
body, html {
    height: 100%;
    background: #e2e2e2
}

body, ul {
    margin: 0;
    padding: 0
}

body {
    font: 14px 微软雅黑, 宋体, arial narrow, HELVETICA;
    -webkit-text-size-adjust: 100%
}

li {
    list-style: none
}

a {
    text-decoration: none
}

.nav {
    width: 12.5%;
    height: 100%;
    background: #263238;
    transition: all .3s
}

.nav a {
    display: block;
    overflow: hidden;
    padding-left: 20px;
    line-height: 46px;
    max-height: 46px;
    color: #abb1b7;
    transition: all .3s
}

.nav a span {
    margin-left: 30px
}

.nav-item {
    position: relative
}

.nav-item.nav-show {
    border-bottom: none
}

.nav-item ul {
    display: none;
    background: rgba(0, 0, 0, .1)
}

.nav-item.nav-show ul {
    display: block
}

.nav-item > a:before {
    content: "";
    position: absolute;
    left: 0;
    width: 2px;
    height: 46px;
    background: #34a0ce;
    opacity: 0;
    transition: all .3s
}

.nav .nav-icon {
    font-size: 20px;
    position: absolute;
    margin-left: -1px
}

.icon_1::after {
    content: "\e62b"

}

.icon_2::after {
    content: "\e669"
}

.icon_3::after {
    content: "\e61d"
}

.nav-more {
    float: right;
    margin-right: 20px;
    font-size: 12px;
    transition: transform .3s
}

.nav-more::after {
    content: "\e621"
}

.nav-show .nav-more {
    transform: rotate(90deg)
}

.nav-show, .nav-item > a:hover {
    color: #fff;
    background: rgba(0, 0, 0, .1)
}

.nav-show > a:before, .nav-item > a:hover:before {
    opacity: 1
}

.nav-item li:hover a {
    color: #fff;
    background: rgba(0, 0, 0, .1)
}

.nav-mini.nav {
    width: 60px
}

.nav-mini.nav .nav-icon {
}

.nav-mini.nav .nav-item > a span {
    display: none
}

.nav-mini.nav .nav-more {
    margin-right: -20px
}

.nav-mini.nav .nav-item ul {
    position: absolute;
    top: 0;
    left: 60px;
    width: 180px;
    z-index: 99;
    background: #3c474c;
    overflow: hidden
}

.nav-mini.nav .nav-item:hover {
    background: rgba(255, 255, 255, .1)
}

.nav-mini.nav .nav-item:hover .nav-item a {
    color: #fff
}

.nav-mini.nav .nav-item:hover a:before {
    opacity: 1
}

.nav-mini.nav .nav-item:hover ul {
    display: block
}

.content {
    margin: 50px;
    margin-bottom: 50px;
    padding: 50px;
    height: 80%;
    background-color: #fff;
    border-radius: 30px;
}

.red {
    color: red
}